1930’s Timeline of EventsFebruary 18, 1930: American astronomer, Clyde Tombaugh, discovered the planet Pluto at the Lovell Observatory in Flagstaff, Arizona.March 17, 1931: The Star Spangled Banner is approved by President Hoover as the national anthem.January 22, 1932: The Reconstruction Finance Corporation is established to stimulate banking and business. Unemployment rates had reached 12 million.December 5, 1933: The 21st Amendment to the U.S. Constitution is passed ending prohibition.June 6, 1934: The U.S. Securities and Exchange Commission is established with the signing of the Securities Exchange Act into law by President Roosevelt.June 2, 1935: Greatest hitter in the history of baseball, Babe Ruth, retires from Major League Baseball.November 3, 1936: Franklin D. Roosevelt overwhelms his Republic challenger, Alfred Landon, for a second presidential term.March 26, 1937: William Henry Hastie is appointed to the federal bench becoming the first African American to be a federal judge.January 11, 1938: Frances Moulton becomes the first woman to be president of a U.S. national bank.December 14, 1939: Russia is expelled from the League of Nations.